1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b2e0407e16e8f93ba8119fca6db6431f18d31db50ec41bf703b9e0450759291. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f1035dfb-d35b-4b4f-89dd-99805e9d33a0.json and https://artists.proofprofile.net/proofs/artist/f1035dfb-d35b-4b4f-89dd-99805e9d33a0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe49dd0b6f70cba553df9440a680cf82f28011cd35eed3beebadfe6372e8fb4e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPQ2168330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf02afbbadfa06c1c3128c3d7f94514c55227c239c2dd0a7c1c080bce1bd98766. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPW462371065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade8be0ac94ae8d2e8743170bcf1e4c49015c9fcc4b760be97bf441aa67e68ac. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPW462373744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a7ed1fad7ee989d035398d585009cf2ebc3467cc0677fbd4c6f5aa926a0a06. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPR2299108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24ead311ef23653215d734a15b820948a71bb927f6addbf57cc7dc1df9933795. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPW462373745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ee8a6030549950c14adb0c6f51d6e34e07d218be3c86da42dcdd52b20979829. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPW462373747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb7972df2f026ec365ed012dc9c3d90c53e0ec7f61a383f45281949a9c23cf8. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPW462373748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20e53e62863a221388556d9cf93eb3205389cca6c06623704575b5b5575e5dc9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPW462434814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4cede17bf7f318346bd12012ac180a9442e8a42c9ef36695ea55e7056463844. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPW462442888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bdbf33835d47f4754b7bc8fedf85860c7df49189afad61815f9f52248f1de02. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPW462412609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffb4a50af41cf7f33751c46e498d3b09a7b46ea7b00fc8a777b2d9226f9fda0f. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPW462441148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75432eaaa89d3660828e7fb1f822ff5bf00aef271706e0804ea9b45edc956a0e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPW462446177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f63f339e40d050ce47118994c726c1dc399602ee5daf881c3b14ce0432a45a. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPW462441147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadaba67a94ac5916de33e9d7a11df96b791b8994c009140062c4ebf91ff9cc5c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPW462451871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x560ad273bc160b087fb18e28f5eb229ee52e55eeb7b092bb6ded92b20f181cb5. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPW462451872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x967fc105e7f53536dde4a67ff9ab1da12210e52909a3634c01bd10c8868593fb. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPW462424174.
桜舞い散る風があなたの隣をすり抜けて
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cbe5a171ec9c367b6e85e983840edfb928a49bb1fa66005ab1c60be9c701c5f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPW462523785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8db424a467ca7d2329f06bb05dea02683032d7bff1abc7fac3fa22ca5b9eb23. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JP92N2278551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb7972df2f026ec365ed012dc9c3d90c53e0ec7f61a383f45281949a9c23cf8. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPW462373748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75432eaaa89d3660828e7fb1f822ff5bf00aef271706e0804ea9b45edc956a0e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPW462446177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x387a6d951abf697fb6a89b24bd604eff74046c7a7e5295f512a2b5f1d9dadb0e. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPW462511645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5449e9e69233ea7db6450ee5637fbb69c862588eb3c77ad8c407866ca8bf1e. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JP92N2257218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe49dd0b6f70cba553df9440a680cf82f28011cd35eed3beebadfe6372e8fb4e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPQ2168330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5449e9e69233ea7db6450ee5637fbb69c862588eb3c77ad8c407866ca8bf1e. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JP92N2257218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade8be0ac94ae8d2e8743170bcf1e4c49015c9fcc4b760be97bf441aa67e68ac. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPW462373744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f90535d16feab4329ad0b4a58a08fbec421919a0458c1e3395c57e24546b179. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPW462382657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f70f447e4748247dd84e54cdb52d25553eae71e7bde31189a842d69713dad2c. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JP92N2262078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadaba67a94ac5916de33e9d7a11df96b791b8994c009140062c4ebf91ff9cc5c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPW462451871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c04a732d4a4abd68549a506923c925c95f3a44ffc3dd74222fe5621d404b191. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPW462472342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c04a732d4a4abd68549a506923c925c95f3a44ffc3dd74222fe5621d404b191. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPW462472342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x560ad273bc160b087fb18e28f5eb229ee52e55eeb7b092bb6ded92b20f181cb5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPW462451872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f63f339e40d050ce47118994c726c1dc399602ee5daf881c3b14ce0432a45a. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPW462441147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffb4a50af41cf7f33751c46e498d3b09a7b46ea7b00fc8a777b2d9226f9fda0f. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPW462441148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a5422acfc1b102604939de2a73dfab3cc9799eeaf1e40849aa582845352f33. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPW462373746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x306415d42a9f027295893a8a6f7db4eb71f34ffe48f2fd7048f202a3b488087a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPW462555682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b6dea6e263aac8d824428db1ba78cd64e800832031fcffb79087656de9ba798. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPW462544455.